Since the movies in the point group module are rather small, I have redone
them in animated GIF format for display through a browser. They are now 640x480
pixels and contain, depending on the symmetry, anywhere from 12 to 72 frames each.
The loop parameter in the Netscape Application Extension Block has been set to
500.

The movies can be downloaded as needed from this page,
or the entire gzipped and tarred archive can be downloaded from here
(48602312 bytes).

Another archive...this one contains 32 JPEG files (compressed with quality 100%), one
for each point group. The rendering was done at 1200x1200 pixels, and the images in
this archive can be printed on a good quality color printer, e.g., on transparencies
for classroom use. You can download the archive here
(7970148 bytes).

All images and individual movie frames were rendered by the
Rayshade 4.0
public domain ray tracing package. If you want to create your own movies, perhaps
rotating them around a different axis, or making the helices move, or ... (endless
possibilities, only limited by the size of your hard drive...) then
you can use this archive (32043 bytes) as a starting point. It contains
the complete set of Rayshade input files, including the positions of all
symmetry elements and all atoms. You are welcome to modify these files, and if
you do get a nice result, please let me know about it...

The following copyright applies to all files in this distribution.
Copyright (c) 1998 Marc De Graef
All rights reserved.
Redistribution and use with or without modification, are permitted
provided that the following conditions are met:
1. Redistributions of this archive must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. The name of the Author may not be used to endorse or promote products
derived from this distribution without specific prior written permission.
In particular, commercial use of images produced from this distribution
in any form of print is not allowed, unless specific prior written permission
has been granted.
THIS DISTRIBUTION IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.

And now a word about the sponsor:

The development of this program was only possible with financial help from the
National Science Foundation (DMR-9501017, Bruce MacDonald program monitor).

I would welcome any kind of feedback about this distribution; in particular, I am looking for
answers to the following questions:

In what kind of environent did you use this distribution?

Did you like it?

How would you modify the distribution?

Does this set of files provide you with a better tool to explain point groups?